During the boom years, the Maryland-based silica sand supplier was selling 2 million tons per quarter. By the second quarter of 2015, that figure had dropped by almost half to 1.2 million tons per ...

Silica sand is divided into three categories based on the size of the particles: less than 0.4 mm, 0.5 mm-0.7 mm, and more than 0.7 mm. These particles fall into a variety of 4 mesh to 200 mesh US ...